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For my final project I built a sous-vide immersion cooker

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Re: For my final project I built a sous-vide immersion cooker

#31
My friend did a DIY Sous-vide towards the end of last year, no android app, but has a simple UI for set point and tuning.

He actually made it a mains plug pass through (UK version) so that you can use it with a traditional slow cooker for some temperatures etc.

Blog link: http://rfwebb.com/projects/sous-vide-part-2/ Extra pictures (Skip all the PCB ones): http://imgur.com/a/aG1Jp

Edit: source code: https://github.com/bitdivision/sous-vide

Re: For my final project I built a sous-vide immersion cooker

#32
post #23
post #22

Earlier quoted context omitted.

You can use mason jars if you are worried about plastic.

That works for things that perfectly fill a mason jar, but not well otherwise; the giant air pockets are an issue.

I completely agree, I'm just stating the alternative. Sometimes standard freezer ziploc bags aren't even big enough. I was doing a large prime rib a while ago and has to use the larger size freezer bags that aren't normally available at my grocery store. If you used something else you would need a large amount of butter/liquid to get rid of the air.

Re: For my final project I built a sous-vide immersion cooker

#33
post #13

Earlier quoted context omitted.

You definitely want to sear though, both before and after (Kenji Alt is wrong about this). For flavor.

I'm dubious about searing it twice; it's something I've never seen mentioned in the reading I've done on slow, temperature-controled cooking. It seems like it would just dry out the edges, making them leathery; however, I'm willing to be educated otherwise in the effort to make a great steak.

The pre-sear (which can be lighter than the post-sear) adds flavor, but also makes the (important) post-sear much faster, which also minimizes the degree to which the post-sear will raise the interior temperature of your protein.

The pre-sear is especially important with long cooks, because it kills surface bacteria. The first time you get too much lactobacillus hitching a ride on your short ribs will be the last time you skip out on the pre-sear. (Lacto isn't dangerous; after all, the protein is pasteurized in the bath, but the final product will smell awful).

I'm not sure what you mean by "drying out the edges, making them leathery". I think I can just say "no" on that.

Re: For my final project I built a sous-vide immersion cooker

#34

Earlier quoted context omitted.

From the same page a cheap sous-vide hack: http://www.seriouseats.com/2010/04/cook-your-meat-in-a-beer-...

That's good for a 1-hour steak, but I wouldn't do eggs this way (needs more precise temp) or a 72-hour short rib braise (needs stable heat for longer).

I agree--and even for one hour timeframes, be sure to check your ending temperature to make sure it didn't cool off too much. I'm not a fan of the beer-cooler method for this reason (although with care, of course, it's safe).

Re: For my final project I built a sous-vide immersion cooker

#35

Not directly related to the tech, but "sealing in the juices" with a sear is broscience. [1] http://www.seriouseats.com/2009/12/the-food-lab-how-to-cook-...

"Sealing in the juices" is definitely false, but a hot sear to cause the Maillaird protein reaction is important if you want to have the distinctive "traditional" steak taste.

Re: For my final project I built a sous-vide immersion cooker

#36
post #23
post #22

Earlier quoted context omitted.

You can use mason jars if you are worried about plastic.

That works for things that perfectly fill a mason jar, but not well otherwise; the giant air pockets are an issue.

I find it generally easier to cut items into portion sizes before cooking them sous vide.

- It makes the size more manageable in your water bath. - You don't have to worry as much about temperature ramp-up time between outer surface and core of food item. - For delicate proteins, means there's less handling of the item post-cooking.

-Jeff

Re: For my final project I built a sous-vide immersion cooker

#38
post #16

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This is what is holding me back on getting into sous vide. Any non plastic alternatives?

Are plastics known for breaking down at 134 degrees f?

Additives to plastics break down at lower temperatures. EVA breaks down at around 149f (you meant f, right, because nothing is cooked sous vide over boiling temperature).

Re: For my final project I built a sous-vide immersion cooker

#39
I've done some sous-vide after watching Chef Steps[1] on youtube. I just used a water thermometer and ziplock bags, which they have some examples of in their videos.

My smallest stove top burner at its lowest setting gets water up to 117F. The salmon video they had the temp at 109, but I tried it anyway. It turned out amazing - I'd definitely do it again. I also tried steak, but bought a cheap cut, and it turned out really good as well. I turned the burner up to 2.5 which got the water temp to around 135F.

I'm so happy with my results I'm looking at purchasing a real sous-vide heater. Sous-vide definitely has a bright future.

[1]: https://www.youtube.com/user/chefsteps

Re: For my final project I built a sous-vide immersion cooker

#40
post #16

Earlier quoted context omitted.

This is what is holding me back on getting into sous vide. Any non plastic alternatives?

I fully expect plastics labelled with e.g "up to 90 degrees C" to not release anything unwanted into my food if I stay well below that temp. I'd also expect the label to have a wide margin to dangerous temperatures. In theory you can use anything that handles the temperature, such as silicone. You could in theory force your food into a jar with a bit of oil.

food in jar with oil = confit, a fairly popular, and very long lasting, preparation in the sous-vide at home world.
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